Section 22 (Charging System (Service Information)): Generator: Inspection: Inspection

WARNING: This page is about a different car, the 2012 Lexus IS 350C. However, it is still accessible from the selected car via links, so may be relevant.

INSPECT GENERATOR CLUTCH PULLEY

Hold the center of the pulley, and confirm that the outer ring turns counterclockwise and does not turn clockwise.

Fig 1: Inspecting Generator Pulley With Clutch

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TEXT IN ILLUSTRATION

*1	Free
*2	Lock

If the result is not as specified, replace the clutch pulley.

INSPECT GENERATOR DRIVE END FRAME BEARING
1. Check that the bearing is not rough or worn.
  
  Fig 2: Inspecting Generator Drive End Frame Bearing
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  OK
  
  The bearing rotates smoothly.
  
  If the bearing does not rotate smoothly, replace the bearing.
INSPECT GENERATOR BRUSH HOLDER ASSEMBLY
1. Using a vernier caliper, measure the length of the exposed brushes.
  
  Fig 3: View Of Measuring Brush Length
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  TEXT IN ILLUSTRATION
  
  *1 Length
  
  Standard exposed length
  
  9.5 to 11.5 mm (0.375 to 0.452 in.)
  
  Minimum exposed length
  
  4.5 mm (0.178 in.)
  
  If the exposed length is less than the minimum, replace the brush holder assembly.

INSPECT GENERATOR ROTOR ASSEMBLY

Check that the generator rotor bearing is not rough or worn.

Fig 4: Inspecting Generator Rotor Assembly
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If necessary, replace the generator rotor assembly.

Check the generator rotor for an open circuit.

Fig 5: View Of Measuring Resistance Between Slip Rings

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

TEXT IN ILLUSTRATION

*1	Slip Ring
*2	Ohmmeter

Using an ohmmeter, measure the resistance between the slip rings.

Standard Resistance

Condition	Specified Condition
Approx. 20°C (68°F)	1.5 to 1.9 Ω

If the result is not as specified, replace the generator rotor assembly.

Check the rotor for a short to ground.

Fig 6: View Of Measuring Resistance Between Slip Ring And Rotor

TEXT IN ILLUSTRATION

*1	Slip Ring
*2	Rotor
*3	Ohmmeter

Using an ohmmeter, measure the resistance between the slip ring and rotor.

Standard Resistance

Tester Condition	Specified Condition
Slip ring - Rotor	1 MΩ or higher

If the result is not as specified, replace the generator rotor assembly.

Using a vernier caliper, measure the slip ring diameter.

Fig 7: View Of Measuring Slip Ring Diameter
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
TEXT IN ILLUSTRATION

*1 Diameter

Standard diameter

14.2 to 14.4 mm (0.560 to 0.566 in.)

Minimum diameter

14.0 mm (0.552 in.)

If the diameter is less than the minimum, replace the generator rotor assembly.